Add reference for db instance/cluster param/subnet/vpcsecurity group (#97)

Issue #, if available:
aws-controllers-k8s/community#1378

Description of changes:
Add reference for DBInstance/Cluster ParameterGroup/SubnetGroup/vpcSecurityGroup. 

Here is my testing process, it should apply to param group and vpc security group too. 

1. Try create a rds instance `brucegu-test-ref-4` and specify 
```  
dbSubnetGroupRef:
    from:
      name: "brucegu-test-subnet-11""
```
 but no `brucegu-test-subnet-11` is available yet. 
2. Verify db instance state has 
```
   Message:               dbsubnetgroups.rds.services.k8s.aws "brucegu-test-subnet-11" not found
    Status:                Unknown
    Type:                  ACK.ReferencesResolved
```
3. Create db SubnetGroup  `brucegu-test-subnet-11` from SubnetGroup CRD 
4. Verify db instance `brucegu-test-ref-4` is created successfully and Resource synced successfully.
```
  Conditions:
    Last Transition Time:     2022-07-07T22:09:25Z
    Status:                   True
    Type:                     ACK.ReferencesResolved
    Last Transition Time:     2022-07-07T22:09:26Z
    Message:                  Late initialization successful
    Reason:                   Late initialization successful
    Status:                   True
    Type:                     ACK.LateInitialized
    Last Transition Time:     2022-07-07T22:09:26Z
    Message:                  Resource synced successfully
    Reason:
    Status:                   True
    Type:                     ACK.ResourceSynced
```


By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: brucegucode

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,13 +1,13 @@
 ack_generate_info:
-  build_date: "2022-07-06T21:17:58Z"
-  build_hash: f9ab7cca7c2ea2ac77d0c4d2dfeb0b42ade56f38
+  build_date: "2022-07-07T19:58:37Z"
+  build_hash: 0aa529e87bd86c6ba52db8c3524ddecb2876bafe
   go_version: go1.18.2
-  version: v0.19.2-4-gf9ab7cc
-api_directory_checksum: d6c6f02d6f5547b3092054e9c7c35f5840f8bef9
+  version: v0.19.2-5-g0aa529e
+api_directory_checksum: a60467e94dc7e76bf34ff50f21691507d576fefc
 api_version: v1alpha1
 aws_sdk_go_version: v1.44.27
 generator_config_info:
-  file_checksum: 2d0c40614a7482376d47885f84cdb713d4307392
+  file_checksum: bb74db41177efd5c2c2dee2b106ff4ad8e9adcdb
   original_file_name: generator.yaml
 last_modification:
   reason: API generation

apis/v1alpha1/db_cluster.go

@@ -107,6 +107,19 @@ resources:
           resource: Key
           service_name: kms
           path: Status.ACKResourceMetadata.ARN
+      DBClusterParameterGroupName:
+        references:
+          resource: DBClusterParameterGroup
+          path: Spec.Name
+      DBSubnetGroupName:
+        references:
+          resource: DBSubnetGroup
+          path: Spec.Name
+      VpcSecurityGroupIds:
+        references:
+          resource: SecurityGroup
+          service_name: ec2
+          path: Status.ID
     renames:
       operations:
         CreateDBCluster:
@@ -186,6 +199,19 @@ resources:
           resource: Key
           service_name: kms
           path: Status.ACKResourceMetadata.ARN
+      DBParameterGroupName:
+        references:
+          resource: DBParameterGroup
+          path: Spec.Name
+      DBSubnetGroupName:
+        references:
+          resource: DBSubnetGroup
+          path: Spec.Name
+      VpcSecurityGroupIds:
+        references:
+          resource: SecurityGroup
+          service_name: ec2
+          path: Status.ID
       BackupTarget:
         late_initialize: {}
       NetworkType:

apis/v1alpha1/db_instance.go

@@ -130,13 +130,41 @@ spec:
                   of an existing DB cluster parameter    group. \n Valid for: Aurora
                   DB clusters and Multi-AZ DB clusters"
                 type: string
+              dbClusterParameterGroupRef:
+                description: 'AWSResourceReferenceWrapper provides a wrapper around
+                  *AWSResourceReference type to provide more user friendly syntax
+                  for references using ''from'' field Ex: APIIDRef:   from:     name:
+                  my-api'
+                properties:
+                  from:
+                    description: AWSResourceReference provides all the values necessary
+                      to reference another k8s resource for finding the identifier(Id/ARN/Name)
+                    properties:
+                      name:
+                        type: string
+                    type: object
+                type: object
               dbSubnetGroupName:
                 description: "A DB subnet group to associate with this DB cluster.
                   \n This setting is required to create a Multi-AZ DB cluster. \n
                   Constraints: Must match the name of an existing DBSubnetGroup. Must
                   not be default. \n Example: mydbsubnetgroup \n Valid for: Aurora
                   DB clusters and Multi-AZ DB clusters"
                 type: string
+              dbSubnetGroupRef:
+                description: 'AWSResourceReferenceWrapper provides a wrapper around
+                  *AWSResourceReference type to provide more user friendly syntax
+                  for references using ''from'' field Ex: APIIDRef:   from:     name:
+                  my-api'
+                properties:
+                  from:
+                    description: AWSResourceReference provides all the values necessary
+                      to reference another k8s resource for finding the identifier(Id/ARN/Name)
+                    properties:
+                      name:
+                        type: string
+                    type: object
+                type: object
               deletionProtection:
                 description: "A value that indicates whether the DB cluster has deletion
                   protection enabled. The database can't be deleted when deletion
@@ -552,6 +580,22 @@ spec:
                 items:
                   type: string
                 type: array
+              vpcSecurityGroupRefs:
+                items:
+                  description: 'AWSResourceReferenceWrapper provides a wrapper around
+                    *AWSResourceReference type to provide more user friendly syntax
+                    for references using ''from'' field Ex: APIIDRef:   from:     name:
+                    my-api'
+                  properties:
+                    from:
+                      description: AWSResourceReference provides all the values necessary
+                        to reference another k8s resource for finding the identifier(Id/ARN/Name)
+                      properties:
+                        name:
+                          type: string
+                      type: object
+                  type: object
+                type: array
             required:
             - dbClusterIdentifier
             - engine

apis/v1alpha1/generator.yaml

@@ -229,6 +229,20 @@ spec:
                   character must be a letter \n    * Can't end with a hyphen or contain
                   two consecutive hyphens"
                 type: string
+              dbParameterGroupRef:
+                description: 'AWSResourceReferenceWrapper provides a wrapper around
+                  *AWSResourceReference type to provide more user friendly syntax
+                  for references using ''from'' field Ex: APIIDRef:   from:     name:
+                  my-api'
+                properties:
+                  from:
+                    description: AWSResourceReference provides all the values necessary
+                      to reference another k8s resource for finding the identifier(Id/ARN/Name)
+                    properties:
+                      name:
+                        type: string
+                    type: object
+                type: object
               dbSnapshotIdentifier:
                 description: "The identifier for the DB snapshot to restore from.
                   \n Constraints: \n    * Must match the identifier of an existing
@@ -241,6 +255,20 @@ spec:
                   \n Constraints: Must match the name of an existing DBSubnetGroup.
                   Must not be default. \n Example: mydbsubnetgroup"
                 type: string
+              dbSubnetGroupRef:
+                description: 'AWSResourceReferenceWrapper provides a wrapper around
+                  *AWSResourceReference type to provide more user friendly syntax
+                  for references using ''from'' field Ex: APIIDRef:   from:     name:
+                  my-api'
+                properties:
+                  from:
+                    description: AWSResourceReference provides all the values necessary
+                      to reference another k8s resource for finding the identifier(Id/ARN/Name)
+                    properties:
+                      name:
+                        type: string
+                    type: object
+                type: object
               deletionProtection:
                 description: "A value that indicates whether the DB instance has deletion
                   protection enabled. The database can't be deleted when deletion
@@ -758,6 +786,22 @@ spec:
                 items:
                   type: string
                 type: array
+              vpcSecurityGroupRefs:
+                items:
+                  description: 'AWSResourceReferenceWrapper provides a wrapper around
+                    *AWSResourceReference type to provide more user friendly syntax
+                    for references using ''from'' field Ex: APIIDRef:   from:     name:
+                    my-api'
+                  properties:
+                    from:
+                      description: AWSResourceReference provides all the values necessary
+                        to reference another k8s resource for finding the identifier(Id/ARN/Name)
+                      properties:
+                        name:
+                          type: string
+                      type: object
+                  type: object
+                type: array
             required:
             - dbInstanceClass
             - dbInstanceIdentifier

apis/v1alpha1/zz_generated.deepcopy.go

@@ -32,6 +32,20 @@ rules:
   - list
   - patch
   - watch
+- apiGroups:
+  - ec2.services.k8s.aws
+  resources:
+  - securitygroups
+  verbs:
+  - get
+  - list
+- apiGroups:
+  - ec2.services.k8s.aws
+  resources:
+  - securitygroups/status
+  verbs:
+  - get
+  - list
 - apiGroups:
   - kms.services.k8s.aws
   resources: